{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "Post - hoc t - tests revealed significant differences between placebo and ketamine for the amounts of words generated during lexical and semantic verbal fluency , while the phonological domain remained unaffected ."}
{"Disease": [], "Chemical": ["ketamine"]}